Nice idea. I have one of those Sears shotguns I picked up at a flea market many years ago. Mine is 16 gauge though so installing one of those heat shields is out. The takedown feature of this gun is nice though....chris3
You could add a discrete copper shim or two and I think it would work on a 16.
I had planned on cutting down an ord marked aerial training barrel for this project, but put it in the classifieds instead.